Collapsible dental-cement-injecting tube.



No. 7|6,677'. Patented Dec. 23, |902..

H. L. CBUTTENDEN. l CDLLAPSIBLE DENTAL CEMENT INJEGTING TUBE.

(Application med my 12, 1902.1

- UNITED STATES ArnN'r frrrcn.

HENRY L. ltUITENDEN,A OF NORTHFI'ELD, MINNESOTA.

COLLAPSIBLE DENTAL-CEMENT-INJECTING TUBE.

SPECIFICATION forming part of Letters Patent No. 716,677, dated December23, 1902.

Original application filed Uctcber 26, 1900, Serial No. 84,405. Dividedand this application filed May 12, 1902. Serial No. 106,879. (No model.)

vGement-Injecting Tubes; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to Which it appertains to make and use thesame.

My present invention has for its object to provide a simple andefficient cemen t-injecting tube for injecting cement or other plasticmaterial into the roots of teeth in setting crowns and bridgeivork, andis in the nature of a division of my prior application, Serial No.34,405, iiled October 2G, 1900, entitled Dental-cement injectors.

To the above ends the invention consists of the novel constructionhereinafter described, and defined in the claims.

The invention is illustrated in the accompanying drawingawherein likecharacters indicate like parts throughout the several views.

Figure l is a plan view of a collapsible cement-injecting tube designedin accordance with my invention. Fig. 2 is a longitudinal section takenon the line :r2 mi of Fig. l, show ing the tube in normal condition, butloaded with cement; and Fig. 3 is a sectional view corresponding to Fig.2,but showing the tube partially collapsed.

The character c, indicates the body of the collapsible tube, Which tubeis open at one end and is formed at its other end with a contracted andattenuated or capillary dischargenipple h, through which the cement isinjected.` The discharge nipple b should be long enough to reach to thebottom of the cavity or canal of the root into which the cement is to beinjected, and of course must be of such smalldiameter as to enable it tofreely enter such cavity. This makes it possible to inject the cementfrom the rst to the very bottom of the cavity and to drive out all airtherefrom in the act of filling the cavity. As is evident, if any airshould be caged in the bottom of the cavity by the cement the llingwould not be complete, and bad results would follow.

The cement (indicated by the character z) is placed within the tubeWhile in plastic condition through the large open end thereof,

(indicated at c.) The tube ci, it will be noted,

is shown as slightly tapered toward the nipple b and is funnel-shaped atits junction with the said nipple. The former-noted feature is not veryimportant; but thelatter feature is highly important, as it preventscement from lodging in the vicinity of the receiving end of the nipple.It will be noted that the large opening c of said tube is of the same orapproximately the same diameter as the interior of the tube, thus makingthe insertion of the cement an easy matter. Even if the receiving end ofthe said tube were to be slightly expanded the tube would be consideredas still having a receiving-opening of the same or approximately thesame diameter as the interior of the tube.

To eject the cement from the tube through the nipple b, it is necessaryfirst to close the large open end of the tube and then to collapse thetube by pressing the sides of the same together. So far as my presentinvention is concernedV the tube may be collapsed either by pressurefrom the fingers or by the use of pliers or pincers-such, for instance,as is shown and claimed in my prior application above identified.

The collapsible tube may be made either of metal or tough paper; but inall cases it must, ot' course, be made of material which may be easilycollapsed or pressed together, so as to eject the cement through thenipple b, as already described.

By actual usage I have demonstrated the ediciency of the device abovedescribed for the purposes set forth.

What I claim, and desire to secure by Letters I )atent of the UnitedStates, is as follows:

l. A collapsible dental-cement-injecting tube formed open at both ends,the opening at the one end being substantially the diamter of theinterior of the tube, and the opening at the other end being through acapillary passage formed in a long attenuated neck portion Which isadapted to be inserted into the cavity ot a tooth, substantially asdescribed.

2. A collapsible dental-cement-injecting IOO tube formed open at bothends, the opening into the cavity of a tooth, substantially as at oneend being,r substantially the diameter described. 0f the interior of thetube, and the opening In testimony whereof I affix my signature at theother end being a capillary passage in presence of two Witnesses. 5formed in a long attenuated neck portion, HENRY L. CRUTTENDEN.

whichneck portion is connected to the body Witnesses: of said tube by agradually-flaring funnel- CHAS. N. CRUTTENDEN, shaped section, and isadapted to be inserted L. LOUISE ORR.

